(split from Astrognome)Created GsweHouseData struct to hold house data, including starting sign

src/gswe-moment.h

@@ -60,6 +60,12 @@ typedef struct {
     guint revision;
 } GswePlanetData;
 
+typedef struct {
+    guint house;
+    gdouble cusp_position;
+    GsweSignInfo *sign;
+} GsweHouseData;
+
 typedef struct {
     GsweMoonPhase phase;
     gdouble illumination;